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NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: Low-Temperature Specific Heat of the 123, 124 and 247 Phases of Y-Ba-Cu-O in Magnetic Fields up to 14 Tesla
Author(s): D. Sanchez, A. Junod, J.Y. Genoud, T. Graf, and J. Muller
Publication: Physica C Volume: 200 Issue: Not Available Year: 1992 Page(s): 1-11
Editor(s): Not Available
Publisher: Elsevier Science Publishers B.V.
Language: English
Notes: Not Available
Keywords: Material Specification, Specific Heat

Materials and Properties

Y:123; [Y-Ba-Cu-O]
Y:124; [Y-Ba-Cu-O]
Y:247; [Y-Ba-Cu-O]
Material Specification for Y:123; [Y-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Junod et al., Physica C, Vol. 162-164, (1989), G. Triscone et al., Physica C, Vol. 168, 40 (1990), and J.Y. Genoud et al., Physica C, Vol. 177, 315 (1991), and summarize the procedures as follows. "... we selected high-quality samples... of YBa2Cu3O7 ("123"), YBa2Cu4O8 ("124") and Y2Ba4Cu7O15 ("247")."
Formula: YBa2Cu3O7
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Specific Heat for Y:123; [Y-Ba-Cu-O]
Magnetic Field (T) Temperature (K) Specific Heat (J kg-1 K-1)
0.2 7 0.020
0.5 7 0.020
1.0 7 0.021
3.0 7 0.021
7.0 7 0.022
14.0 7 0.023
0.2 6 0.014
1.0 6 0.014
3.0 6 0.014
7.0 6 0.015
14.0 6 0.016
0.2 5 0.008
1.0 5 0.009
3.0 5 0.009
7.0 5 0.010
14.0 5 0.010
0.2 4 0.005
1.0 4 0.005
3.0 4 0.006
7.0 4 0.006
14.0 4 0.006
0.2 3 0.003
1.0 3 0.003
3.0 3 0.003
7.0 3 0.004
14.0 3 0.003
0.2 2 0.001
1.0 2 0.002
3.0 2 0.002
7.0 2 0.002
14.0 2 0.002
0.2 1.1 0.0007
1.0 1.1 0.0009
3.0 1.1 0.0009
7.0 1.1 0.0006
14.0 1.1 0.0006
Measurement Method: Thermal relaxation calorimetry
The authors cite E.M. Forgan et al., Rev. Sci. Instrum., Vol. 51, 411 (1980), and summarize the procedure as follows. "The present measurements were carried out using thermal relaxation calorimetry... The sample holder, a sapphire disk 10 mm in diameter and 0.1 mm thick, is connected via Cu-2 at.%Be wires to a heat sink maintained at a constant temperature T0. The former is heated stepwise by a current through a carbon film to approximately 2T0, and the conductance of the Cu-Be thermal link is determined. The subsequent relaxation towards the temperature T0 yields the specific heat..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
Material Specification for Y:124; [Y-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Junod et al., Physica C, Vol. 162-164, (1989), G. Triscone et al., Physica C, Vol. 168, 40 (1990), and J.Y. Genoud et al., Physica C, Vol. 177, 315 (1991), and summarize the procedures as follows. "... we selected high-quality samples... of YBa2Cu3O7 ("123"), YBa2Cu4O8 ("124") and Y2Ba4Cu7O15 ("247")."
Formula: YBa2Cu4O8
Informal Name: Y:124
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Specific Heat for Y:124; [Y-Ba-Cu-O]
Magnetic Field (T) Temperature (K) Specific Heat (J kg-1 K-1)
0.2 7 0.021
1.0 7 0.022
3.0 7 0.022
7.0 7 0.023
14.0 7 0.023
0.1 6 0.014
0.7 6 0.014
1.0 6 0.015
3.0 6 0.015
7.0 6 0.016
14.0 6 0.016
0.1 5 0.009
1.0 5 0.009
3.0 5 0.010
7.0 5 0.010
14.0 5 0.011
0.3 4 0.006
1.0 4 0.006
3.0 4 0.006
7.0 4 0.007
14.0 4 0.007
0.1 3 0.003
1.0 3 0.003
3.0 3 0.004
7.0 3 0.004
14.0 3 0.004
0.2 2 0.002
1.0 2 0.002
3.0 2 0.002
7.0 2 0.002
14.0 2 0.002
0.2 1.1 0.0007
0.5 1.1 0.0008
1.0 1.1 0.0009
3.0 1.1 0.0009
7.0 1.1 0.0009
14.0 1.1 0.0009
Measurement Method: Thermal relaxation calorimetry
The authors cite E.M. Forgan et al., Rev. Sci. Instrum., Vol. 51, 411 (1980), and summarize the procedure as follows. "The present measurements were carried out using thermal relaxation calorimetry... The sample holder, a sapphire disk 10 mm in diameter and 0.1 mm thick, is connected via Cu-2 at.%Be wires to a heat sink maintained at a constant temperature T0. The former is heated stepwise by a current through a carbon film to approximately 2T0, and the conductance of the Cu-Be thermal link is determined. The subsequent relaxation towards the temperature T0 yields the specific heat..."

Cautions: Evaluated Data
Digitized data were obtined from Figure 7 of the paper.
Material Specification for Y:247; [Y-Ba-Cu-O] Process: Solid State Reaction
Notes: The authors cite A. Junod et al., Physica C, Vol. 162-164, (1989), G. Triscone et al., Physica C, Vol. 168, 40 (1990), and J.Y. Genoud et al., Physica C, Vol. 177, 315 (1991), and summarize the procedures as follows. "... we selected high-quality samples... of YBa2Cu3O7 ("123"), YBa2Cu4O8 ("124") and Y2Ba4Cu7O15 ("247")."
Formula: Y2Ba4Cu7O15
Informal Name: Y:247
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:

Specific Heat for Y:247; [Y-Ba-Cu-O]
Magnetic Field (T) Temperature (K) Specific Heat (J kg-1 K-1)
14 1.1 0.0003
14 1.2 0.0004
14 1.6 0.0006
14 2.4 0.0012
14 3.0 0.0018
14 3.5 0.0025
14 4.2 0.0034
14 4.4 0.0039
3 1.0 0.0005
3 1.1 0.0005
3 1.6 0.0008
3 2.5 0.0015
3 3.3 0.0022
3 3.9 0.0029
3 4.4 0.0036
0.5 1.1 0.0004
0.5 1.4 0.0005
0.5 1.8 0.0007
0.5 2.6 0.0012
0.5 3.3 0.0019
0.5 3.9 0.0025
0.5 4.4 0.0033
0 1.1 0.0003
0 1.9 0.0007
0 2.6 0.0011
0 3.5 0.0019
0 4.1 0.0027
0 4.4 0.0032
Measurement Method: Thermal relaxation calorimetry
The authors cite E.M. Forgan et al., Rev. Sci. Instrum., Vol. 51, 411 (1980), and summarize the procedure as follows. "The present measurements were carried out using thermal relaxation calorimetry... The sample holder, a sapphire disk 10 mm in diameter and 0.1 mm thick, is connected via Cu-2 at.%Be wires to a heat sink maintained at a constant temperature T0. The former is heated stepwise by a current through a carbon film to approximately 2T0, and the conductance of the Cu-Be thermal link is determined. The subsequent relaxation towards the temperature T0 yields the specific heat..."

Cautions: Evaluated Data
Digitized data were obtained from Figure 5 of the paper.